package com.rbac.api.interceptor;

import com.rbac.api.interceptor.component.CheckPowerComponent;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.cors.CorsUtils;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
@Order(10001)
public class CheckPowerInterceptor implements HandlerInterceptor {

    @Autowired
    private CheckPowerComponent checkPowerComponent;


    /***
     * 在请求处理之前进行调用（Controller方法调用之前）
     * // 只有返回true才会继续向下执行，返回false取消当前请求
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object object) throws Exception{

        //跨域直接返回 true
        if(CorsUtils.isPreFlightRequest(request)){
            return true;
        }

        //检查权限
        checkPowerComponent.checkPowerByTokenAndUrl(request);

        //默认
        return true;
    }





    /*****
     * 在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行（主要是用于进行资源清理工作）
     * @param request
     * @param response
     * @param object
     * @param e
     * @throws Exception
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object object, Exception e)
            throws Exception {
    }


    /***
     * 请求处理之后进行调用，但是在视图被渲染之前（Controller方法调用之后）
     * @param request
     * @param response
     * @param object
     * @param andView
     * @throws Exception
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object object, ModelAndView andView)
            throws Exception {
    }
}

